Improvement in pumps



UNITED STATES PATENT OFFICE.

J. P. NEVENS, OF STARK, MAINE.

IMPROVEMENT IN PUMPS.

Specification forming part of Letters Patent No. 415685, dated May 10, 1864.

To all whom it may concern Be it known that I,J. P. NEVENS, of Stark, in the county of Somerset and State of Maine, have invented a new and Improved Pump; and I do hereby declare that the following is a full, clear, and exact description of the stme, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l represents a sectional front elevation of my invention. Fig. 2 is a transverse vertical section of the same.

Similar letters or" reference indicate corresponding parts in the several tigures.

This invention relates to an improvement in that class of pumps in which a hinged plunger is employed which works in a suitable box, being connected at its loose end by mea-ns of a rod to a suitable handlevcr, so that an oscillating motion can br imparted to it.

The nature ot my invention and its peculiar advantages will be readily understood from the following description A represents a box, made of wood or any i other suitable material, square or oblong, or in any other suitable form or shape. The interior of this box is occupied by aplungcr, B, which tits nicely within the box, and which is connected with the same by means of a hinge, a. This hinge is secured to one end of the box,at about the middle of its height, and when the plunger stands in a horizontal position it divides the box in two equal parts. The front end of the box is curved, being a part of a circle described from the hinge as a center, and the edges of the plunger are provided with suitable packing-strips, b, which are forced out against the inner surfaces of the box by means of springs c, so that a tightjoint is e'ected all round between the plunger and interior surface of the box. The loose end of the plunger is suspended from a rod, d, which connects with a hand-lever, G, that has its fulcrum in the upper end of the pumpstock D, as clearly shown in Fig. 2 of the drawings. By means of this lever an oscillating motion can be imparted to the plunger. The box A is provided with two inlet-ports, e e', which communicate with the suction-pipe leading down into a well, and it is also furnished with two discl1argeports,ff, which form the communication between the same and the stock D. The ports e andflead to that portion of the box below the plunger and the ports e and f to that portion above the plunger, and the ports c e are provided with valves e* e* opening inward, while thc ports ff are provided with valves f* fit'opening outward. (SceFig-2.) On raisingthe plunger B from the position shown in Fig. l the valve e opens and water enters into the space below the plunger, and any water which may be found in the space above the plunger is forced out through the valve fit. When the plunger has reached its highest position,the space below is tilled with water, and on its returnstroke the plunger forces this water out through the valveft, and at the same time the valve e* opens, and the space above the plunger fills with water. By this arrangement a double-acting forceand-suction pump with an oscillating plunger is produced, and a pump can thus be constructed in a very simple manner without many tools, and so that a very large quantity of water can be raised to a considerable height with comparatively little exertion of the operator.

I do not claim as my invention apump with an oscillating plunger; but

Vhat I do claim as new, and desire to secure by Letters Patent, is

The combination of the inlet-ports e e and outlet-ports f f', with the oscillating plunger B, pump-box A, and stock D, all constructed and operating as and for the purposes shown and described.

JABES P. NEVENS.

Vitnesses:

WM. B. SNOW, J o'rHAN S. HARDY. 

